package net.sk.china.city.service.impl;

import net.sk.china.city.constant.UserConstants;
import net.sk.china.city.domain.*;
import net.sk.china.city.domain.dto.TreeSelect;
import net.sk.china.city.mapper.ArTeamMapper;
import net.sk.china.city.mapper.SysDeptMapper;
import net.sk.china.city.service.ISysDeptService;
import net.sk.china.city.utils.*;
import net.sk.china.common.exception.ServiceException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.*;
import java.util.stream.Collectors;

/**
 * 部门管理 服务实现
 *
 * @author ruoyi
 */
@Service
public class SysDeptServiceImpl implements ISysDeptService
{
    @Autowired
    private SysDeptMapper deptMapper;

//    @Autowired
//    private SysRoleMapper roleMapper;
    @Autowired
    private ArTeamMapper arTeamMapper;

    /**
     * 查询部门管理数据
     *
     * @param dept 部门信息
     * @return 部门信息集合
     */
    @Override
    public List<SysDept> selectDeptList(SysDept dept)
    {
        return deptMapper.selectDeptList(dept);
    }

    /**
     * 查询部门树结构信息
     *
     * @param dept 部门信息
     * @return 部门树信息集合
     */
    @Override
    public List<TreeSelect> selectDeptTreeList(SysDept dept)
    {
        List<SysDept> depts = SpringUtils.getAopProxy(this).selectDeptList(dept);
        return buildDeptTreeSelect(depts);
    }

    /**
     * 构建前端所需要树结构
     *
     * @param depts 部门列表
     * @return 树结构列表
     */
    @Override
    public List<SysDept> buildDeptTree(List<SysDept> depts)
    {
        List<SysDept> returnList = new ArrayList<SysDept>();
        List<Long> tempList = depts.stream().map(SysDept::getDeptId).collect(Collectors.toList());
        for (SysDept dept : depts)
        {
            // 如果是顶级节点, 遍历该父节点的所有子节点
            if (!tempList.contains(dept.getParentId()))
            {
                recursionFn(depts, dept);
                returnList.add(dept);
            }
        }
        if (returnList.isEmpty())
        {
            returnList = depts;
        }
        return returnList;
    }

    /**
     * 构建前端所需要下拉树结构
     *
     * @param depts 部门列表
     * @return 下拉树结构列表
     */
    @Override
    public List<TreeSelect> buildDeptTreeSelect(List<SysDept> depts)
    {
        List<SysDept> deptTrees = buildDeptTree(depts);
        return deptTrees.stream().map(TreeSelect::new).collect(Collectors.toList());
    }

    /**
     * 根据角色ID查询部门树信息
     *
     * @param roleId 角色ID
     * @return 选中部门列表
     */
    @Override
    public List<Long> selectDeptListByRoleId(Long roleId)
    {
//        SysRole role = roleMapper.selectRoleById(roleId);
//        return deptMapper.selectDeptListByRoleId(roleId, role.isDeptCheckStrictly());
        return Collections.emptyList();
    }

    /**
     * 根据部门ID查询信息
     *
     * @param deptId 部门ID
     * @return 部门信息
     */
    @Override
    public SysDept selectDeptById(Long deptId)
    {
        return deptMapper.selectDeptById(deptId);
    }

    /**
     * 根据ID查询所有子部门（正常状态）
     *
     * @param deptId 部门ID
     * @return 子部门数
     */
    @Override
    public int selectNormalChildrenDeptById(Long deptId)
    {
        return deptMapper.selectNormalChildrenDeptById(deptId);
    }

    /**
     * 是否存在子节点
     *
     * @param deptId 部门ID
     * @return 结果
     */
    @Override
    public boolean hasChildByDeptId(Long deptId)
    {
        int result = deptMapper.hasChildByDeptId(deptId);
        return result > 0;
    }

    /**
     * 查询部门是否存在用户
     *
     * @param deptId 部门ID
     * @return 结果 true 存在 false 不存在
     */
    @Override
    public boolean checkDeptExistUser(Long deptId)
    {
        int result = deptMapper.checkDeptExistUser(deptId);
        return result > 0;
    }

    /**
     * 校验部门名称是否唯一
     *
     * @param dept 部门信息
     * @return 结果
     */
    @Override
    public boolean checkDeptNameUnique(SysDept dept)
    {
        Long deptId = StringUtils.isNull(dept.getDeptId()) ? -1L : dept.getDeptId();
        SysDept info = deptMapper.checkDeptNameUnique(dept.getDeptName(), dept.getParentId());
        if (StringUtils.isNotNull(info) && info.getDeptId().longValue() != deptId.longValue())
        {
            return UserConstants.NOT_UNIQUE;
        }
        return UserConstants.UNIQUE;
    }

    /**
     * 校验部门是否有数据权限
     *
     * @param deptId 部门id
     */
    @Override
    public void checkDeptDataScope(Long deptId)
    {
        if (!SysUser.isAdmin(SecurityUtils.getUserId()))
        {
            SysDept dept = new SysDept();
            dept.setDeptId(deptId);
            List<SysDept> depts = SpringUtils.getAopProxy(this).selectDeptList(dept);
            if (StringUtils.isEmpty(depts))
            {
                throw new ServiceException("没有权限访问部门数据！");
            }
        }
    }

    /**
     * 新增保存部门信息
     *
     * @param dept 部门信息
     * @return 结果
     */
    @Override
    public int insertDept(SysDept dept)
    {
        SysDept info = deptMapper.selectDeptById(dept.getParentId());
        // 如果父节点不为正常状态,则不允许新增子节点
        if (!UserConstants.DEPT_NORMAL.equals(info.getStatus()))
        {
            throw new ServiceException("部门停用，不允许新增");
        }
        dept.setAncestors(info.getAncestors() + "," + dept.getParentId());
        return deptMapper.insertDept(dept);
    }

    /**
     * 修改保存部门信息
     *
     * @param dept 部门信息
     * @return 结果
     */
    @Override
    public int updateDept(SysDept dept)
    {
        SysDept newParentDept = deptMapper.selectDeptById(dept.getParentId());
        SysDept oldDept = deptMapper.selectDeptById(dept.getDeptId());
        if (StringUtils.isNotNull(newParentDept) && StringUtils.isNotNull(oldDept))
        {
            String newAncestors = newParentDept.getAncestors() + "," + newParentDept.getDeptId();
            String oldAncestors = oldDept.getAncestors();
            dept.setAncestors(newAncestors);
            updateDeptChildren(dept.getDeptId(), newAncestors, oldAncestors);
        }
        int result = deptMapper.updateDept(dept);
        if (UserConstants.DEPT_NORMAL.equals(dept.getStatus()) && StringUtils.isNotEmpty(dept.getAncestors())
                && !StringUtils.equals("0", dept.getAncestors()))
        {
            // 如果该部门是启用状态，则启用该部门的所有上级部门
            updateParentDeptStatusNormal(dept);
        }
        return result;
    }

    /**
     * 修改该部门的父级部门状态
     *
     * @param dept 当前部门
     */
    private void updateParentDeptStatusNormal(SysDept dept)
    {
        String ancestors = dept.getAncestors();
        Long[] deptIds = Convert.toLongArray(ancestors);
        deptMapper.updateDeptStatusNormal(deptIds);
    }

    /**
     * 修改子元素关系
     *
     * @param deptId 被修改的部门ID
     * @param newAncestors 新的父ID集合
     * @param oldAncestors 旧的父ID集合
     */
    public void updateDeptChildren(Long deptId, String newAncestors, String oldAncestors)
    {
        List<SysDept> children = deptMapper.selectChildrenDeptById(deptId);
        for (SysDept child : children)
        {
            child.setAncestors(child.getAncestors().replaceFirst(oldAncestors, newAncestors));
        }
        if (children.size() > 0)
        {
            deptMapper.updateDeptChildren(children);
        }
    }

    /**
     * 删除部门管理信息
     *
     * @param deptId 部门ID
     * @return 结果
     */
    @Override
    public int deleteDeptById(Long deptId)
    {
        return deptMapper.deleteDeptById(deptId);
    }

    @Override
    public List<SiteTreeNode> selectSiteTree() {
        String platformId = PlatformIdHolder.getPlatformId();
        List<Site> siteList = deptMapper.selectDeptTreeByPlatformId(platformId);
        // 根节点也即当前用户部门id
        Long rootId = Long.valueOf(platformId.substring(platformId.lastIndexOf(',') + 1));
        return buildSiteTreeList(siteList, rootId);
    }

    @Override
    public List<SysDept> selectAllDept() {
        return deptMapper.selectAllDept();
    }

    private List<SiteTreeNode> buildSiteTreeList(List<Site> siteList, Long rootId) {
        Map<Long, SiteTreeNode> map = new HashMap<>();

        // 首先，将所有site转换为siteTree，并存入map
        for (Site site : siteList) {
            SiteTreeNode siteTreeNode = new SiteTreeNode(site.getId(), site.getName());
            map.put(site.getId(), siteTreeNode);
        }

        List<SiteTreeNode> result = new ArrayList<>();
        // 然后，构建树形结构
        for (Site site : siteList) {
            SiteTreeNode current = map.get(site.getId());

            if (site.getParentId() == null || site.getParentId().equals(rootId)) { // 根节点
                result.add(current);
            } else {
                SiteTreeNode parent = map.get(site.getParentId());
                if (parent != null) {
                    parent.getChildren().add(current);
                }
            }
        }
        int maxDepth = findMaxDepth(result, 1);
        setNullToDeepestLeafChildren(result, 1, maxDepth);


        return result;
    }


    @Override
    public List<SiteTreeNode> selectSiteTree2() {
        String platformId = PlatformIdHolder.getPlatformId();
        List<Site> siteList = deptMapper.selectDeptTreeByPlatformId(platformId);
        List<ArTeam> teamList = arTeamMapper.selectAllTeamList(platformId);
        // 根节点也即当前用户部门id
        Long rootId = Long.valueOf(platformId.substring(platformId.lastIndexOf(',') + 1));
        return buildSiteTreeList2(siteList, teamList, rootId);
    }

    private List<SiteTreeNode> buildSiteTreeList2(List<Site> siteList, List<ArTeam> teamList, Long rootId) {
        Map<Long, SiteTreeNode> siteIdNodeMap = new HashMap<>();
        Map<Long, TeamTreeLeafNode> teamIdLeafNodeMap = new HashMap<>();

        // 首先，将所有site转换为siteTree，并存入map
        for (Site site : siteList) {
            SiteTreeNode siteTreeNode = new SiteTreeNode(site.getId(), site.getName());
            siteIdNodeMap.put(site.getId(), siteTreeNode);
        }

        for (ArTeam arTeam : teamList) {
            TeamTreeLeafNode teamTreeLeafNode = new TeamTreeLeafNode(arTeam.getPkId(), arTeam.getTeamName());
            teamIdLeafNodeMap.put(arTeam.getPkId(), teamTreeLeafNode);
        }

        List<SiteTreeNode> result = new ArrayList<>();
        // 然后，构建树形结构
        for (Site site : siteList) {
            SiteTreeNode current = siteIdNodeMap.get(site.getId());

            if (site.getParentId() == null || site.getParentId().equals(rootId)) { // 根节点
                result.add(current);
            } else {
                SiteTreeNode parent = siteIdNodeMap.get(site.getParentId());
                if (parent != null) {
                    parent.getChildren().add(current);
                }
            }
        }

        // 将队伍挂载到站点树当中
        for (ArTeam arTeam : teamList) {
            TeamTreeLeafNode currentLeaf = teamIdLeafNodeMap.get(arTeam.getPkId());
            SiteTreeNode siteTreeNode = siteIdNodeMap.get(arTeam.getSiteId());
            if (siteTreeNode != null) {
                siteTreeNode.getChildren().add(currentLeaf);
            }
        }
        return result;
    }


    public int findMaxDepth(List<SiteTreeNode> nodes, int currentDepth) {
        int maxDepth = currentDepth;
        for (SiteTreeNode node : nodes) {
            if (!node.getChildren().isEmpty()) {
                int childDepth = findMaxDepth(node.getChildren(), currentDepth + 1);
                maxDepth = Math.max(maxDepth, childDepth);
            }
        }
        return maxDepth;
    }

    public void setNullToDeepestLeafChildren(List<SiteTreeNode> nodes, int currentDepth, int maxDepth) {
        for (SiteTreeNode node : nodes) {
            if (currentDepth == maxDepth) {
                node.setChildren(null); // 设置最深层叶子节点的children为null
            } else if (!node.getChildren().isEmpty()) {
                setNullToDeepestLeafChildren(node.getChildren(), currentDepth + 1, maxDepth);
            }
        }
    }

    /**
     * 递归列表
     */
    private void recursionFn(List<SysDept> list, SysDept t)
    {
        // 得到子节点列表
        List<SysDept> childList = getChildList(list, t);
        t.setChildren(childList);
        for (SysDept tChild : childList)
        {
            if (hasChild(list, tChild))
            {
                recursionFn(list, tChild);
            }
        }
    }

    /**
     * 得到子节点列表
     */
    private List<SysDept> getChildList(List<SysDept> list, SysDept t)
    {
        List<SysDept> tlist = new ArrayList<SysDept>();
        Iterator<SysDept> it = list.iterator();
        while (it.hasNext())
        {
            SysDept n = (SysDept) it.next();
            if (StringUtils.isNotNull(n.getParentId()) && n.getParentId().longValue() == t.getDeptId().longValue())
            {
                tlist.add(n);
            }
        }
        return tlist;
    }

    /**
     * 判断是否有子节点
     */
    private boolean hasChild(List<SysDept> list, SysDept t)
    {
        return getChildList(list, t).size() > 0;
    }
}
